Lucene example source code file (FloatLatLng.java)

This example Lucene source code file (FloatLatLng.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lucene tags/keywords

fixedlatlng, fixedlatlng, floatlatlng, floatlatlng, illegal, illegalargumentexception, latlng, latlng, override, override

The Lucene FloatLatLng.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.lucene.spatial.geometry;

/**
 * <p>NOTE: This API is still in
 * flux and might change in incompatible ways in the next
 * release.</font>
 */
public class FloatLatLng extends LatLng {
  private double lat;
  private double lng;
  private boolean normalized;
  
  public FloatLatLng(double lat, double lng) {
    if (lat>90.0 || lat<-90.0) throw new IllegalArgumentException("Illegal latitude value " + lat);
    this.lat=lat;
    this.lng=lng;
  }
  
  public FloatLatLng(LatLng ll) {
    this.lat=ll.getLat();
    this.lng=ll.getLng();
  }
  
  @Override
  public LatLng copy() {
    return new FloatLatLng(this);
  }

  @Override
  public int getFixedLat() {
    return FixedLatLng.doubleToFixed(this.lat);
  }

  @Override
  public int getFixedLng() {
    return FixedLatLng.doubleToFixed(this.lng);
  }

  @Override
  public double getLat() {
    return this.lat;
  }

  @Override
  public double getLng() {
    return this.lng;
  }

  @Override
  public boolean isFixedPoint() {
    return false;
  }

  @Override
  public FixedLatLng toFixed() {
    return new FixedLatLng(this);
  }

  @Override
  public FloatLatLng toFloat() {
    return this;
  }
  
  @Override
  public boolean isNormalized() {
    return 
      normalized || (
          (lng>=-180) &&
          (lng<=180)
          );
  }

  @Override
  public LatLng normalize() {
    if (isNormalized()) return this;
    
    double delta=0;
    if (lng<0) delta=360;
    if (lng>=0) delta=-360;
    
    double newLng=lng;
    while (newLng<=-180 || newLng>=180) {
      newLng+=delta;
    }
    
    FloatLatLng ret=new FloatLatLng(lat, newLng);
    ret.normalized=true;
    return ret;
  }

  @Override
  public LatLng calculateMidpoint(LatLng other) {
    return new FloatLatLng(
        (lat+other.getLat())/2.0,
        (lng+other.getLng())/2.0);
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    long temp;
    temp = Double.doubleToLongBits(lat);
    int result = prime  + (int) (temp ^ (temp >>> 32));
    temp = Double.doubleToLongBits(lng);
    result = prime * result + (int) (temp ^ (temp >>> 32));
    result = prime * result + (normalized ? 1231 : 1237);
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (getClass() != obj.getClass())
      return false;
    FloatLatLng other = (FloatLatLng) obj;
    if (Double.doubleToLongBits(lat) != Double.doubleToLongBits(other.lat))
      return false;
    if (Double.doubleToLongBits(lng) != Double.doubleToLongBits(other.lng))
      return false;
    if (normalized != other.normalized)
      return false;
    return true;
  }

}